How to use unique_ptr& as a parameter for C++
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R.33: when the expression function resets widget, use unique_ptr& as an argument.
Reason (reason)
Using unique_ptr in this way enforces the reset semantics of function calls both in terms of documentation and implementation.
Note (Note)
"reset" means to make a pointer or smart pointer reference another object.
Example (sample)
Void reseat (unique_ptr&); / / "will" or "might" reseat pointerExample, bad (negative example)
Void thinko (const unique_ptr&); / / usually not what you want
Enforcement (implementation recommendations)
(Simple) Warn if a function takes a Unique_pointer parameter by lvalue reference and does not either assign to it or call reset () on it on at least one code path. Suggest taking a T * or T & instead.
(simple) warn if a function uses a Unique_pointer type parameter with a left reference, but does not assign a value to it or call the reset method on at least one code path. It is recommended to use T* or T& instead.
(Simple) (Foundation) Warn if a function takes a Unique_pointer parameter by reference to const. Suggest taking a const T * or const T & instead.
(simple) ((basic)) give a warning if a function uses the Unique_pointer parameter in the form of a constant reference. It is recommended to use const T * or const T & instead.
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